Code Reordering and Speculation Support for Dynamic Optimization Systems

For dynamic optimization systems, success is limited by two difficult problems arising from instruction reordering. Following optimization within and across basic block boundaries, both the ordering of exceptions and the observed processor register contents at each exception point must be consistent with the original code. While compilers traditionally utilize global data-flow analysis to determine which registers require preservation, this analysis is often infeasible in dynamic optimization systems due to both strict time/space constraints and incomplete code discovery. This pape